Files.app: Add a unit test of ProgressCenterHandler class.

chrome/test/data/file_manager/unit_tests/mocks/mock_file_operation_manager.js

Index: chrome/test/data/file_manager/unit_tests/mocks/mock_file_operation_manager.js
diff --git a/chrome/test/data/file_manager/unit_tests/mocks/mock_file_operation_manager.js b/chrome/test/data/file_manager/unit_tests/mocks/mock_file_operation_manager.js
new file mode 100644
index 0000000000000000000000000000000000000000..6d34d7daabe74af1853ff06c9465ccaf24320476
--- /dev/null
+++ b/chrome/test/data/file_manager/unit_tests/mocks/mock_file_operation_manager.js
@@ -0,0 +1,30 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+'use strict';
+
+/**
+ * Mock class of FileOperationManager.
+ * @constructor
+ */
+function MockFileOperationManager() {
+  cr.EventTarget.call(this);
+
+  /**
+   * Event to be dispatched when requestTaskCancel is called.
+   * @type {Event}
+   */
+  this.cancelEvent = null;
+}
+
+MockFileOperationManager.prototype = {
+  __proto__: cr.EventTarget.prototype
+};
+
+/**
+ * Dispatches a pre-specified cancel event.
+ */
+MockFileOperationManager.prototype.requestTaskCancel = function() {
+  this.dispatchEvent(this.cancelEvent);
+};